Related Experiment Video
Updated: May 31, 2026
08:10
Fizzy Extraction of Volatile Organic Compounds Combined with Atmospheric Pressure Chemical Ionization Quadrupole Mass Spectrometry
Published on: July 14, 2017
Bubbles in solvent microextraction: the influence of intentionally introduced bubbles on extraction efficiency
D Bradley G Williams1, Mosotho J George, Riaan Meyer
1Department of Chemistry, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa. bwilliams@uj.ac.za
Analytical Chemistry
|July 14, 2011
Summary
Adding an air bubble to microdrop solvent enhances triazine pesticide extraction. This simple, efficient technique rivals solid phase microextraction for trace analysis.
Area of Science:
- Analytical Chemistry
- Environmental Chemistry
Background:
- Microextraction techniques are crucial for trace analysis of pesticides.
- Traditional microdrop extraction methods face limitations in efficiency and sensitivity.
Purpose of the Study:
- To improve microdrop extraction of triazine pesticides.
- To develop a more sensitive, precise, and matrix-tolerant extraction method.
Main Methods:
- Incorporation of an air bubble into the solvent microdroplet during microextraction.
- Analysis of triazine pesticides at nanogram/liter levels.
- Validation using certified reference materials and real-world matrices (water, fruit juice).
Main Results:
- Significant improvements in extraction efficiency due to increased surface area and thin film phenomena.
- Achieved low limits of detection (LOD 0.002-0.012 μg/L) and quantification (LOQ 0.007-0.039 μg/L).
- Demonstrated high precision (7-12% at 10 μg/L) and tolerance to matrix effects in water and fruit juice.
Conclusions:
- The air bubble-assisted microdrop extraction is a simple, inexpensive, and efficient method for triazine pesticide analysis.
- This technique offers comparable performance to solid phase microextraction methods.
- The method is suitable for trace-level detection in various complex matrices.
